[RE-wrenches] EPDM Roof Attachment/Flashing

[SunHarvest]

Last flat roof mount I did was in San Francisco (high winds, strict building codes). We worked with a roofer who requested that we simply place an L-foot on top of a 3-1/2" block of PT wood or IPE and lay the block on a pad of EPDM straight on the roof; lag down an L-foot through the block into the supporting roof members and the roofer would come behind us and flash around the block & foot. Not sure if this will work in your case...

Stikes
  ----- Original Message ----- 
  From: wirewiz at gmail.com 
  To: RE-wrenches 
  Sent: Monday, December 31, 2012 6:17 AM
  Subject: [RE-wrenches] EPDM Roof Attachment/Flashing


  Hello Wrenches,


  Installing rail mounted PV array on a 2 1/2 / 12 pitch EPDM residential roof. It's a flat section of roof in the middle of the house. Need to keep it low so would like to use 3" or 4" Unirac standoffs. The standard 1-6" peel and stick witches hat is fine for a 7" standoff but too tall for the 3-4" standoff. Unirac and Oatey have advised against using the Oatey aluminum flashing although the roofer who did the roof said it would be OK using seam tape between the Oatey and the EPDM. Another roofer I know has said absolutely not. 


  I did find a rubber Masterflash (6" x 6" base) that's a good fit but all their images show it used on metal roofs only and it's not a peel and stick. Can I use it with seam tape and/or caulking.


  Do I just need to go with the 7" standoff and the standard peel and stick witches hat and forget the low profile?


  Or is their some other system out there (roof attachment/flashing) that would keep it low. The ridge height is already at the 35 ft limit and the upper row of mod's would go above the ridge with the 7" standoff.


  I will work with a roofer but would like to figure this out before just turning it over to the roofer


  Very much appreciate any thoughts.


  Thank you and Happy New Year to you all.


  Larry Liesner
  Design and Installations
  Elektron Solar, LLC
  49 Richmondville Ave Suite 107
  Westport, CT 06880
  203-557-3127 (office)
  203-644-2404 (cell)
  203-549-0977 (fax)
  wirewiz at gmail.com
  NABCEP Certified PV Installer (# 032611-184)



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